505455649939 has 2 divisors, whose sum is σ = 505455649940. Its totient is φ = 505455649938.

The previous prime is 505455649819. The next prime is 505455649943. The reversal of 505455649939 is 939946554505.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505455649939 - 2²⁷ = 505321432211 is a prime.

It is not a weakly prime, because it can be changed into another prime (505455643939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252727824969 + 252727824970.

It is an arithmetic number, because the mean of its divisors is an integer number (252727824970).

Almost surely, 2^505455649939 is an apocalyptic number.

505455649939 is a deficient number, since it is larger than the sum of its proper divisors (1).

505455649939 is an equidigital number, since it uses as much as digits as its factorization.

505455649939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 131220000, while the sum is 64.

The spelling of 505455649939 in words is "five hundred five billion, four hundred fifty-five million, six hundred forty-nine thousand, nine hundred thirty-nine".